Smajlíci v chatu

$smile_search = array();
$smile_replace = array();
$smile_dump = array();

/**
 * Adds a smile to the smile list.
 *
 * Conditions:
 * - Smile have to exist
 * - Smile have to be a PNG file
 * - Maximum smile width is 64px
 * - Maximum smile height is 16px
 * - Smile description have to match the regexp
 *
 * @global array $smile_search
 * @global array $smile_replace
 * @global array $smile_desc
 * @param string $regexp        What to search in text (central part of a regular expression, eg.: ;-?D)
 * @param string $link          Name of the .png file in folder smilies
 * @param string $desc          Description for ALT and TITLE, it have to match the regexp (eg.: ;-D)
 */
function addsmile($regexp, $link, $desc) {
    $file = 'smilies/' . $link . '.png';
    if (file_exists($file)) {
        $iifo = getimagesize($file);
        if ($iifo[0] > 64 || $iifo[1] > 16 || $iifo['mime'] != 'image/png') {
            echo '<!-- WARNING: Smile "' . $file . '" is not a PNG file or is greater then 64x16px -->';
            return false;
        } elseif (!preg_match('/^' . $regexp . '$/is', $desc)) {
            echo '<!-- WARNING: Smile description "' . $desc . '" does not match the "/^' . $regexp . '$/is" expression -->';
            return false;
        } else {
            global $smile_search, $smile_replace, $smile_dump;
            $smile_search[] = '/\B' . $regexp . '\b/is';
            $smile_replace[] = '<img class="smile" src="' . $file . '" alt="' . $desc . '" title="' . $desc . '">';
            $smile_dump[] = '<a href="#" onclick="fillForm(\'' . $desc . '\', \'r\');"><img class="smile" src="' . $file . '" alt="' . $desc . '" title="' . $desc . '"></a>';
            return true;
        }
    } else {
        echo '<!-- WARNING: Smile "' . $file . '" doesen\'t exists -->';
        return false;
    }
}

addsmile(':-?\)', 'smile', ':-)'); //Tento smajlík nefunguje
addsmile(':-?D', 'grin', ':-D'); //Tento smajlík funguje

/**
 * Apply a BBCode to a string.
 * @global array $smile_search
 * @global array $smile_replace
 * @param string $texto input string
 * @return string
 */
function bbcode($texto) {
    global $smile_search, $smile_replace;

    /* BBCode */
   //Tady jsou značky, fungují v pořádku

    /* EMOTICONS */
    $texto = preg_replace($smile_search, $smile_replace, $texto);

    return $texto;
}